10 Best Decking End Grain Sealer for 2025

End Grain Sealing Wax

• Osmo End Grain Sealing Wax protects the end grain from cracks during all elements of weathering
• Minimises the water absorption, as well as the seasoning of the end grains
• The surface is water and dirt resistant
• It is clear and is therefore universally applicable.
• Approx. coverage : 250 decking boards

RONSEAL

• Colour: Clear.
• It is an ideal pre-treatment for interior and exterior wood and suitable for overpainting
• Perfect to use on rough or smooth timber

Roxil

• Waterproofs wood & maintains appearance
• Reduced organic growth - reduces mould & algae growth
• Protects wood from warping and improves dimensional stability
• Long lifetime (10+ years on softwood) - Non Biocidal - Ready for use
• Please be advised that due to Covid-19 related supply issues Container Format or Colour may vary slightly. This does not impact the performance of the product in any way.

Roxil

• ✅ Weatherproofs wood for 10+ years
• ✅ Effective on softwoods and weathered hardwoods
• ✅ One coat application by brush or roller
• ✅ Reduces mould and algae growth
• ✅ Reduces warping

Sika

• Specifically designed to deeply penetrate all wood and joinery to give long-lasting protection from damage caused by wet rot, dry rot, decay and fungi
• Fungicides and algaecides present in this formulation are finely dispersed so that wood penetration and hence effectiveness is much Idealer than standard wood preservation products
• The use of ultra-lightfast pigments on the coloured variants give an even, fade-resistant finish which will last for years. Solvent free, low odour solution based on Micro-fine active technology
• Fast-drying and non-flammable; and application to wet timbers is possible without loss of performance
• Available in multiple sizes and colours including Clear, Dark Oak, Red Cedar, Fir Green and Golden Chestnut
• Wood Preserver
• Size: 1LTR
• Brand: Everbuild

Ronseal

• It's your way to maintain a healthy deck
• Protects decking from rot
• Guards against attack by wood funghi
• For full protection also use a Ronseal Deck Finish
• Unprotected, decking can rot

Ronseal

• The Ronseal Wet Rot Wood Hardener comes in the following:
• Ergonomic design
• Easy to use

Sika

• Kills all wood boring insects, their eggs and larva
• Penetrates deep into the wood for lasting protection
• Treats wet rot and dry rot
• Available as a 1 Litre, 2.5 Litre and 5 Litre
• Triple Action Wood Treatment
• Size: 1LTR
• Brand: Everbuild

chestnut products

• Cestnut End Seal , 1 litre
• Please Note: For shipping this product is classed as Dangerous Goods and we can therefore only ship it to mainland addresses using a courier service. We cannot ship with Royal Mail

SIKA

• Quick Curing Time: Rapid, easy to use water seal that drives within 1 hour
• Dries Clear: Using a solvent free formula, 402 dries clear and will not stain the substrate
• Multi-Substrate: Suitable for use on most common substrates including brick, stone, concrete, pebbledash, rendering and much more
• Anti-Mould Formula: Repels waterborne dirt and resists fungal growth on substrates
• High Strength: Using the latest technology in silicone resin, waterseal form an utmost high strength and high performing water repellent that protects against damaged caused from mould and weather